CVE-2025-66017 – CGGMP21 presignatures can be used in the way that significantly reduces security

CVE ID : CVE-2025-66017

Published : Nov. 25, 2025, 8:16 p.m. | 1 hour, 7 minutes ago

Description : CGGMP24 is a state-of-art ECDSA TSS protocol that supports 1-round signing (requires 3 preprocessing rounds), identifiable abort, and a key refresh protocol. In versions 0.6.3 and prior of cggmp21 and version 0.7.0-alpha.1 of cggmp24, presignatures can be used in the way that significantly reduces security. cggmp24 version 0.7.0-alpha.2 release contains API changes that make it impossible to use presignatures in contexts in which it reduces security.

Severity: 8.7 | HIGH

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